Infrared Filter

Infrared Filter

Infrared filters for high-tech applications

Pleiger Laser Optics IR filters are made of silicon, germanium, spahir, IR fused silica, and ZnSe. The bandpass filters are usually used for gas anlytics (H2O, ethanol, methanol, formaldehyde, CO2, CO, NO,).

Neutral density filters (gray filters) are placed in front of the sensor to reduce the amount of light on the detector. Long-pass and short-pass filters are used to block out spectral ranges.

IR filters from PLEIGER – Quality, made in Germany

IR filters with a high-quality PVD coating with high transmission in the application area.

  • Germamium filter
  • Silicon filter
  • Saphire filter

Filter designs

  • bandpass filter
  • longpass filter
  • shortpass filter
  • 0,8 – 12 µm

We adapt infrared filters to your applications

IR filters for the SWIR, MWIR and LWIR are made of germainium, silicon, sapphire, IR fused silica, zinc sulfides, zinc selenide.

Gas analysis

  • H2O (water)
  • CH4 (methane) 
  • CO2 (carbon dioxide)
  • CO (carbon monoxide)
  • N2O (nitrous oxide)
  • O3 (ozone)

Measurement of environmental influences with IR filter from Pleiger Laseroptik with high peak transmission and high blocking of the VIS and LWIR range. Available on all materials which are transparent in IR.

Application areas of out IR filters:

  • Environmental measurements
  • Temperature measurements
  • Therography, such as in thermal imaging cameras
  • Safety-relevant aspects at industrial production sites
  • Emissions of polluting gases
  • Monitoring of incinerators and refineries
  • Quality control, for example in the chemical industry

Benefit from the advantages of dielectric coatings from Pleiger Laseroptik:

With innovative coatings, we improve the performance of infrared filters and protect the components against environmental influences. In this way, the optics are not damaged under the harsh conditions in industrial lasers.

We use dielectric and metallic coatings in the PVD process. A combination of both materials is also possible. Thanks to the extremely thin layers, we preserve the filter properties and at the same time ensure an ideal surface structure.

To optimise the filter behaviour at certain wavelengths, we recommend our coating technology. It is conceivable here to adjust the transmission for steep angles of incidence.

The long life cycles assure you of maximum practicality.

Do you have questions about the coatings? Our staff will be happy to inform you about the advantages of certain processes.

  •  High stability against environmental influences
  • Wide ranfe of applications
  • Experience and expertise for the SWIR to LWIR

Other optical components

Optical Windows
Optical Windows
Um diesen Inhalt anzeigen zu können, müssen die Cookie-Einstellungen akzeptiert werden

Cookie settings

We are continuously improving our website and we use cookies for this purpose. For an optimal user experience, we recommend that you accept them. Otherwise, parts of the page will be deactivated in the display in accordance with data protection regulations.